inside your skull, of course, and that is your brain. it is very valuable, especially because it is plastic. i want to tell you what that means a tell you about the signs that shows us that that plasticity is actually result could again drive improvements in our abilities or, alas, it can take us backward into in a negative direction. i want to talk about what controls living in a positive or negative direction, because you sure do want to go in a positive direction. finally, want to talk about how we try to use this science with technology to help you sustain your brain health. i will give you advice about other things you can undo, whether your problem is a disability or you have that comment disability that applies to every one of us, you're simply having another birthday, like i am today. ok? on the path to a better, healthier, say few -- safer, and hopefully happier life.